EFFECT OF GROWTH REGULATORS ON PHYSIOLOGICAL INDICES AND REPRODUCTIVE EFFICIENCY IN BELL PEPPER cv. TARIHAL LOCAL (Capsicum annuum L. )
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Date
2001-08-08
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
A field experiment was conducted at college of Agriculture, University of Agricultural
Sciences, Dharwad during Kharif 1998 to find out the effect of growth regulators on physiological and
biochemical parameters and reproductive efficiency in Bell pepper (cv. Tarihal local). The experiment
consisted of fifteen treatments comprising of Naphthalene acetic acid (NAA) and Mepiquat chloride
(MO) at different concentrations and was laid out in randomised block design with three replications.
The plant height increased significantly due to NAA and decreased with Mepiquat
chloride. The application of growth regulators significantly increased the per cent fruit set, number of
branches, stem dry weight, dry matter production in reproductive parts and total dry matter.
The leaf area, LAI, LAD, SLA, were significantly more with NAA, while treatments
with MC reduced the same. AGR, CGR, RGR, NAR, SLW and BMD increased significantly due to the
application of growth regulators.
The total chlorophyll content, nitrate reductase activity, and ascorbic acid content
increased significantly due to the application of growth regulators. All the growth regulator treatments
significantly increased fruit yield/plant, number of fruits/plant, average fruit weight, 1000 seed weight
and number of seeds/fruit. The fruit yield was significantly higher with MC @ 1500 ppm at 45 + 65
DAT followed by MC @ 1500 ppm at 45 DAT as compared to control. The fruit yield was positively
correlated with number of branches, total dry matter in reproductive parts, SLW, NAR, total chlorophyll
content, nitrate reductase, ascorbic acid content and yield components viz., average fruit weight, test
weight and seed number/fruit. From the economic point of view, Mepiquat chloride @ 500 ppm at 45
DAT was more profitable.
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